Apparatus for controlling or assisting respiration

摘要: 894,094. Respiratory appliances. BRITISH OXYGEN CO. Ltd. Feb. 3, 1961 [Feb. 1960], No. 3823/60. Class 81 (2). In a forced breathing respirator the supply valve is controlled by pressure-responsive member which actuated flow-meter in accordance with volume of gas passed to patient. The control-valve assembly comprises pivoted 7 mounted so that it can close either 29 or 3 according its position and bellows 9, movable end carries magnet 11. When collapsed this approaches attracts it, closed, but when distended, fixed 10 predominates tilted 3. Gas enters chamber 2 through tube 1 thence passes an injector 4, where entrains air, then flows resistance element 16 pressure drop across communicated diaphragm 21, dividing two chambers 19, 20, consequently moved towards right at rate depending on setting needle 22. At movement plunger 23 engages 24 allows from pass interior 9 cause distend until moves over alternative position. patient thus cut off his lungs collapse naturally while flow pipe 28 opens 27 extracts 19. This restores 21 original while, now contents escape adjustable 13. slowly under spring 14 conditions are restored. Since constant for any given 22 time during inspiration continued depends duration exhalation determined